Download  Print this page
   
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440

Advertisement

3-34 FUEL SYSTEM (DFI)
Self-Diagnosis

Backups

The ECU takes the following measures to prevent engine damage when the DFI or the ignition
system parts have troubles.
Service
Parts
Codes
11
Throttle Sensor
Inlet Air
12
Pressure
Sensor
Inlet Air
13
Temperature
Sensor
Water
14
Temperature
Sensor
Crankshaft
21
Sensor
Gear Position
25
Switch
Vehicle-down
31
Sensor
41
Fuel Injector
46
Fuel Pump
51
Ignition Coil
Note:
(1) D-J Method and α - N Method: When the engine load is light like at idling or low speed, the ECU
determines the injection quantity by calculating from the throttle vacuum (inlet air pressure sensor
output voltage) and engine speed (crankshaft sensor output voltage). This method is called D-J
method (low-speed mode). As the engine speed increases, and the engine load turns middle to
heavy, the ECU determines the injection quantity by calculating from the throttle opening (throttle
sensor output voltage) and the engine speed. This method is called α - N method (high-speed
mode).
Output Signal Usable
Range or Criteria
Throttle Sensor Output
Voltage
0.391 ∼ 4.512 V
Inlet Air Pressure
Output Voltage
0.352 ∼ 4.824 V
Inlet Air Temperature
Output Voltage
0.117 ∼ 4.922 V
Water Temperature
Output Voltage
0.195 ∼ 4.902 V
Crankshaft sensor must
send 18 signals (output
signal) to the ECU at
the one cranking.
Gear Position Sensor
Output Voltage
0.469 ∼ 4.727 V
Vehicle-down Sensor
Output Voltage
0.176 ∼ 4.727 V
In succession pulse is
input to ECU.
Supply Voltage
6 ∼ 15 V
Send signals (output
voltage) continuously to
the ECU.
Backups by ECU
If the throttle sensor system fails (the signal is
out of the usable range, wiring short or open),
the ECU locks ignition timing into the ignition
timing at closed throttle position and sets the
DFI in the D-J method.
Also, the throttle sensor system and inlet
air pressure fails, the ECU locks ignition
timing into the ignition timing at closed throttle
position and sets the DFI in the α-N method.
If the inlet air pressure sensor system fails (the
signal Pv is out of the usable range, wiring
short or open), the ECU sets the DFI in the α
- N method.
Conduct ignition and injection operations
whenever crank rotates by 360 degrees.
ECU sets Ta at 26°C.
ECU sets Tw at 80°C.
If crankshaft sensor generates other than 18
signals, the engine stops by itself.
If the gear position switch fails, set the low (1)
gear position.
If the vehicle-down sensor system has failures,
the ECU shuts off the fuel system and the
ignition system. ECU does not backup.
If the injector break down, wiring short or open,
the ECU stops the signal input to injector and
the fuel delivery to cylinder is stopped.
If the pump fails, wiring short or open, the ECU
stops the pump operations.
If the ignition coil fails, the ECU shuts off the
signal to the ignition coil.

Advertisement

Table of Contents

   Also See for Kawasaki kx450f

Comments to this Manuals

Symbols: 0
Latest comments: